Add Fedora vala-tools dependency to INSTALL
Add Fedora vala-tools dependency to INSTALL

rschroll/geary,jimbonator/geary,mjog/geary,tshikaboom/geary,martinra/geary,mjog/geary,AtticHacker/geary,aatishnn/geary,tshikaboom/geary,robol/geary,mjog/geary,geekvigilante/geary,robol/geary,robol/geary,jimbonator/geary,githubnemo/geary,glebihan/geary,tshikaboom/geary,githubnemo/geary,aatishnn/geary,glebihan/geary,jimbonator/geary,abn/geary,kpiwko/geary,MohamedIM/geary-unofficial,aatishnn/geary,AtticHacker/geary,emersion/geary,martinra/geary,mpdeimos/geary,martinra/geary,glebihan/geary,AtticHacker/geary,githubnemo/geary,rschroll/geary,emersion/geary,emersion/geary